Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e927fdeab130b7…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 15:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6ceb974570b5d93f0d66706ee21c914e SHA-1: afce86ee920508b012f7525e6284cc9fa7b1a5ae SHA-256: a2e927fdeab130b767d347594deb9f372e53c3ef1ca48954d39a2773e4287f4d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the presence of numerous external URIs points to an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=dewalt+20v+drill+vs+12v PDF link annotation
    • https://cdn.sqhk.co/sajesijef/Zie0ykU/activity_lifecycle_trong_android.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/wunaginavedutus.pdfIn PDF document text
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/5428822.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/talubew-rezakitamibimi-vovenuzezope-lagutivuda.pdfIn PDF document text
    • https://gekowodi.weebly.com/uploads/1/3/5/3/135321574/9986104.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/Ighxeha/53282226588.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/wafiliga.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/lJshajc/basketball_arcade_machine_for_rent_philippines.pdfIn PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/2892547.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/6347410.pdfIn PDF document text
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/pufudi.pdfIn PDF document text
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/toniloz.pdfIn PDF document text
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/25822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f969fac5-638e-4e0b-968f-c8371932dcec/elgato_game_capture_card_hd60_s_switch.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/how_to_repair_ge_microwave_door_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8e91aa-9528-4ab4-b0f8-4e56dcbb3404/najarenav.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/anemia_drepanoctica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b05b09-f0ae-43cf-bbab-cd81b4b3eb52/dogujusepagasububavuna.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 5296 bytes
SHA-256: db69bde1f827509a177eb476902b8043b4a802e507e6a5c552f82a2b9fb832e6
font_01_sfnt_off00010975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10975 10696 bytes
SHA-256: b899225407b9cff1ed4a01ecce0ff0a5b4f4d93affab8e382d72f188b98d4e78

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